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Finding the Fourth Proportional to 84,705.08, 127,062.90 and 28,540.52

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Solution

The fourth proportional to 84,705.08, 127,062.90 and 28,540.52 is: 42,812.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,705.08 : 127,062.90 = 28,540.52 : x
  2. Step 2: Convert to fraction form
    84,705.08/127,062.90 = 28,540.52/x
  3. Step 3: Cross multiply
    84,705.08x = 127,062.90 × 28,540.52
  4. Step 4: Simplify right side
    84,705.08x = 3,626,441,238.71
  5. Step 5: Solve for x
    x = 3,626,441,238.71/84,705.08
  6. Step 6: Final answer
    x = 42,812.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.